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20 inch 36V 250W front hub motor – electric bike conversion kit

Posted by on March 11, 2025 Comments Off on 20 inch 36V 250W front hub motor – electric bike conversion kit

Q: We are interested in leaf 20 inch 36v 250w front hub motor – electric bike kit. Item ID #LBCK2036250F
When I buy this electric bike conversion kit . I saw picture full Twist (Twist throttle No battery gauge), please can you change to half Twist? I want this Half Twist. My DAHAN will work match washer + front hub the 100mm fork and disk? See link info the DAHAN how look Hope help.

A: This bike conversion kit doesn’t need battery gauge, because LCD can display battery gauge, we can ship you a half twist throttle to replace this full twist.
If the spacing of your fork is 100mm (picture enclosed),this #LBCK2036250F can work with disk brake.

Q: We will buy this bike conversion kit later. LCD display have MPH? I see this youtube for full max speed 21.7mph which is 36V 10Ah Rack lithium ion OR 36V 8Ah bottle lithium battery?
I think will buy any online for 36V 10Ah Li-ion Water bottle Battery, will super up hall and super run road full 21.7mph?

A: This LCD display KMH, can’t display MPH now. One week later, we will have new LCD controller. This hub motor controller has more function:
 Cruise
 Reverse
 Regen brake
 Mph / kmh
 Pedal assist ( 1 – 5 )
 …

This old hub motor controller work with this 20 inch 36v 250 front hub motor wheel. Max speed:21.7mph (We test use 36v lead acid battery)
36V 10ah Rack lithium or 36V 8ah bottle lithium ion battery both can reach max 21.7mph.

We have 36V 11ah lithium-ion water bottle battery in stock, but we haven’t updated it to leaf site. The difference between them is the bottle size of 36V 11ah higher than 36V 8Ah bottle.

When you use 36V 10ah lithium-ion water bottle battery and ride it, full speed is about 18mph.(21.7mph is no load)

Sure if I would buy the 36V 8ah bottle lithium ion battery can work with 20 inch 36V 250W front hub motor max full 21.7mph and or 24 inch 36V 250W front hub motor max full 26mph? (LBCK2436250F)

My DAHAN Typhoon twin Brake right please find attach see picture, if this e-bike right brake cable can off one, or get right twin brake e-bike?

How connect electric hub motor controller wires

Posted by on March 10, 2025 Comments Off on How connect electric hub motor controller wires

Q: Now that I understand the purpose of these wires, I need to know exactly how to connect bike conversion kit wires.
1. “you could use a switch(on/off)to short pink and black”
1.1 What kind of switch? Is it included this bike kit or I have to buy it?
1.2 If I have to buy a switch, what are the characteristics of it? How do I connect pink/black wires to the switch?
1.3 If so, do I need to buy additional wires to connect pink/black to the switch? If so – what are the characteristics of it, wire resistance/diameter?
1.4 These pink/black wires are connected to a plastic connector
Do I need to buy another connector to connect my new hub motor ?

2 “use yellow and brown wires coming from the throttle to control your bike kit cruise.”
2.1 Again-how would I do that? Do I need to connect yellow/brown wires somewhere on the hub motor controller, is so – how?
2.2 Please note that these wires don’t have any kind of connector attached – am I suppose to connect them ?

3 “put the green wire to “+” and the grey to “-“, your LED on your throttle will light”
3.1 Where are the “+” and “-” you are referring to? Is it on the battery itself, or controller, or elsewhere? (for example: battery itself doesn’t seem to have open +/- sockets – other than the one used by the supplied cable)
3.2 Can I connect green/grey permanently (so that LED always shows the battery status), if so – how would I connect? Where would I connect them to exactly – controller or battery?
3.3 Again please note that green/grey wires are not attached
to any connector, just “bare” wires, so I don’t understand how can I connect them?
If you have any additional photographs and/or drawings, please share them also. If I need to buy
additional parts – please let me know what they are.

A: Don’t mistake with the positive and cathode of your bike kit battery to hub motor controller.(red and black battery wires).It doesn’t matter about making a mistake with other wires.
Don’t worry. Short any thin wires, it doesn’t burn your controller.
1.Cruise: when your motor is running, connect the pink wire to black wire(use a wire to connect pink and black wire) or you could use your brake lever to test this function. When your brake, it will cruise, when your loose your brake level, it will cancel cruise function.
2.This switch just have on/off function, you could buy other switches in your market
3.You should use a wire to connect bike conversion kit, it doesn’t matter about wire resistance / diameter, is this wire, no current.
4.You could use spare connector: yellow connect pink wire, brown connect black wire (C&Z),when your motor is running, press this red switch, your motor will cruise as the same speed.
Put the green wire to battery “+”
Put the grey wire to battery “-”
The Led will light, try it as I said, it doesn’t burn anything.
In fact, it’s very easy to do it, for example, you could use your
handle brake (two wires) to make a female connector connect any connector (white & black, pink & black)from hub motor controller.
If possible, you could use a software “e-drawing” to open our 3D about this hub motor controller.

How to build spokes on hub motor for electric bike ?

Posted by on March 10, 2025 Comments Off on How to build spokes on hub motor for electric bike ?

DIY electric bike conversion kit and convert your bike is funny. Sometimes we prefer to purchase spoke hub motor , bike rim and spokes. And build spokes on electric bike motor by ourselves.

If we want to convert 26inch front wheel, we should purchase 1 set of front spokes hub motor, 26inch rim and 36pcs of spokes. We can purchase them from leaf bike motor shop online.

Received goods and check them:
1. How many spokes you received. Generally we need 36 pcs spokes to built on hub motor and 12 gauge spokes for electric bike. 13, 14 gauge spokes are too thin, just for common bike.
2. There are 36 eyelet on bike rim and hub motor.
3. Check nipple and the dia. of eyelet on rim, make sure the nipple can put into eyelet.

Calculate the length of spoke :
If you use 205 leaf front hub motor, the eyelet to eyelet of rim is 511mm that is 26inch rim, spokes should be 155mm length.

You need below tools to install spokes on hub motor.
1.iron shelf
2.slotted screwdriver
3.nipple wrench
4.magnet
5.rubber hammer
6.tape measure
7.calipers

Done check, everything is okay. But we found the dia. of nipple is 4.5mm and the rim is also 4.5mm. These eyelets are too small. See pictures.

Get a 4.8mm electric drill. Drill 36 pcs of eyelets. Adjust the iron shelf so that the dia. is 100mm. Because standard front fork is 100mm. Then put the rim inside the iron shelf, hold on the hub motor. Make the first spoke wear into hub from left side, the next from right side. One by one from left side to right side. Done install all 36 pcs of spokes, please check them whether correct. See pictures.

If no problem, we should hold spokes on rim by nipples First hold one spoke on left side, then cross to fix another spoke on left side. Next step, cross two spokes on rights side and fix them. Left side, right side, a group of four spokes. See pictures.

Fix all spokes, we should use wrench to tight spokes a little, please don’t be too tight. Use hand to turn wheel, make sure there is no noise from friction of rim and nipple. Use rubber hammer to knock rim when the wheel is running so that the rim will be not jumping up and down. Still to tight spokes a little. See pictures.

Turn wheel, you will find the rim from left side to right side. In order to make the wheel running in the middle. We use calipers to measure and get the data. Then use a magnet to hold a pin. See pictures. If rim to the left, we tight right side spokes or loose left side spokes. See pictures.

It takes about 1 hour to build an wheel.

Electric hub motor bike conversion kit for electric bike

Posted by on March 10, 2025 Comments Off on Electric hub motor bike conversion kit for electric bike

Ride a bike everyday is good for health. It can help you lose weight and achieve healthier body. By the way,sometimes riding for a long trip or steep road that is too tired.Buy a new e-bike is too expensive.Why not place an order for bike conversion kit and convert your common bike to electric bike by yourself.

Standard bike conversion kit includes:
1.hub motor wheel (8″ 10″ 12″ 14″ 16″ 18″ 20″ 24″ 26″ 27.5″ 700c 28″ 29″ 27″)
2.motor controller(drive hub motor)
3.twist throttle or thumb throttle(default twist throttle)
4.brake lever with low voltage to brake
5.three-button switches(control horn,led lights,cruise..)
6.pas(for Europe)
7.battery with charger(optional)

1 set of bike conversion kit has three key products:hub motor,motor controller and electric bike battery.
Hub Motor:There are 8″ 10″ 12″ 14″ 16″ 18″ 20″ 24″ 26″ 27.5″ 700c 28″ 29″ 27″ hub motor,what inch would you choose depend on your common bike wheel size.Motor type:brushed hub motor or brushless hub motor also called BLDC hub motor.Now because the bldc hub motor has advantage of low noise,high efficiency that replace of brushed hub motor.
Leaf Motor has 36V 750W / 48V 1000W brushless gearless electric bike motors are popular with North America.The other 24V 250W / 36V 250W bldc geared hub motors,European prefer them.

Motor Controller:Bldc motor controller which is called a heart of bike conversion kit system.Generally 6-MOSFET controller drives 250W hub motor,9-MOSFET drives 500W,12-MOSFET drives 1000W bldc motor.
Leafmotor is selling a LCD motor controller that display speed,mileage,battery gauge.

Battery:In China,electric bikes still use lead-acid batteries,they’re much cheaper,but a little heavy.North America or Europe always use lithium batteries that are more environmental.
Leafmotor has three types of lithium batteries:high speed,frog and bottle electric bike batteries for customers to choose.We found most of issues from lithium batteries that were not used correctly.
Three are two advice about how to use lithium battery.
1.Please remove power connector. If you don’t ride your e-bike for a couple of days.
2.Charge your battery often,but please don’t overcharge it.

Received your bike conversion kit,please check packing box first,then disconnect it and check each product that make sure all goods are okay.Then prepare below tools to install bike kit.
1.open-end wrench(loose/tight screw nuts)
2.philips screwdriver(fix LCD)
3.some zip ties(fix wires)

Remove the front or rear wheel.Find out the motor’s direction of rotation.Fix this motorized hub motor wheel to your frame fork and use open-end wrench to tight both screw nuts.According as install instruction manual and wiring diagram to connect wires make sure your wheel in the air,power on your battery,test bike conversion kit system.Turn throttle,if motor works well without any noise.Then use zip ties to fix wires.If not,please re-check your wire connecting.

If everything is good,it will take about 10 minutes to done it.Just order 1 set of electric hub motor bike conversion kit,your common bike will become electric bike.Cost less,get more.Have you found some fun?

Hub motor,bldc motor,bike conversion kit supplier: Leaf Motor Technology Co.,Ltd.

need user manual for 700c 250w electric bike kit

Posted by on March 8, 2025 Comments Off on need user manual for 700c 250w electric bike kit

Q:Ordered 1 set of bike conversion kit from leafmotor couple days ago.
Waited for nearly 7 days,picked up box in local post office.
Disconnect this package,everything is nice,especially LCD display,as said,it can display speed,mileage,battery gauge..
Happy to done conversion,spend half a day.Hub motor works well.But can’t find any data display on this LCD, I don’t know how to set this LCD.

Need a user’s manual for set LCD, urgently!!!

Answer 1:
It’s very hard to find this manual on leafmotor’s website.
Please links below address to download this file.

Answer 2:
Thank you,Joe Please free to ask us,if need Tech problem.

This Bike Conversion Kit Item:
Product list as below:
1.700c double aluminium rim front wheel with 36V 250W brushless geared hub motor;
2.36V 250W brushless controller with LCD display(display speed,mileage,battery gauge)
3.thumb throttle OR twist throttle(optional)
4.brake lever with low voltage brake
5.three-button switches(It’s a ON/OFF switch used for control your front&rear lights,cruise,horn..)
6.Pedal Assist(PAS is used for European countries)

Note:About 5 years ago,most of this 250w mini motor is brushless gearless,but it has low torque of disadvantage.Now in market,use this kind of brushless geared motor to replace it.

This motor is still brushless sensor motor,but inside motor,a gear box more. Please review pictures.

The speed of this 700c electric bike kit is a little fast than 26″ bike kit.Because 700c is a little bigger than 26″ rim.

Our standard 250w electric bike conversion kit
Speed:15miles/hour
Power:250W
It’s fit for European cycling law.
Sure,if need high speed or low speed e bike kit,we can customize as your need.

Answer 3:
More information about this 36V 250W brushless geared motor
The structure of inside,picture enclosed.

The best answer:the second answer

going to order leaf bike conversion kit with lithium battery

Posted by on March 2, 2024 Comments Off on going to order leaf bike conversion kit with lithium battery

Q:Going to order your 20 inch 72v 2500w bike conversion kit and will need a 72v lithium battery. Any recommendations? Like to have one built to these specs: 72v 40a BMS 1000AH

Here’s my Cargo Ebike: Eunorau G30 Orange Cargo Bike to check out the shape of the battery casing.

A: Yes,we can make 72V 18ah lithium battery.
Would you need 1000Ah?

Q: Also, on the 20″ 72v 2500w bike conversion kit, does it have Juliet connectors on all major components? Yes. I want a 1000ah pack.

A: 1000ah? It’s equal to 50 sets of 72v 20ah lithium battery. Your bike can’t carry these lithium batteries.
Your bike max use 72v 50ah.

Q: Ok. I’ll take the 72v 50ah lithium battery and it will lock in same position on the bike correct? 
And have a 40A BMS correct?(the controller in that kit is 40A max)
50ah I can ride for awhile between charges.
How many N.M. of torque does that motor produce?
On the 72v 2500w 20 inch bike conversion kit I also need a 7-speed freewheel. Will you install that as well? Eunorau G30 Orange Cargo Ebike

A: Yes.Can make 72v 50ah.But 3A charger charge battery is too slow.Also,too many cells.
We recommended 2 or 3 sets of 72v 18ah 40A lithium battery.That’s better than 1 set of 72v 50ah 40A

Q: What about 2 sets of 72v 30ah lithium battery?
I know even better 1) 72v 40ah 40a less cells and you can make it to fit in the housing of the frame .

A: Supply you frame size, let me check max can how ah.
We can customize lithium battery size as your frame.

Order 20 inch 48V 2000W front fat hub motor electric bike conversion kit

Posted by on September 2, 2023 Comments Off on Order 20 inch 48V 2000W front fat hub motor electric bike conversion kit

Order 20 inch 48V 2000W front fat hub motor electric bike conversion kit
Q: I need to order this item Item ID #LBCK20482000FS 20 inch 48V 2000W front fat hub motor electric bike conversion kit and all have to do is install it and it should be ready to go using my 60V 20A lithium battery ? Is it very difficult set up? Will there be instructions on how to set up the LB08HU? Is there an app to connect to the LCD display? Approx time if I order to get it shipped?

Will this this kind of hub motor melt if a heavy biker rides it on a 20% grade steep hills and electric hub motors are a challenge and require a properly sized and adjusted system to avoid overheating. The torque a hub motor can make is related to the physical magnet strength, width, air gap and diameter. The winding arrangement determines the voltage and current to make this torque. I also would like to add a part for better cooling.

Did you get my update info,Please advise if the one you recommend will meet these requirements.

A: This 20 inch 48V 2000W front fat hub motor electric bike conversion kit can work with 60V 20Ah lithium battery.
Very easy to install.
But because this hub motor is stronger and heavy,it’s fit for front snow bike ‘s  135mm dropout

08HU manual enclosed. 
Where to install each part and how to connect each wires as below wire diagram
https://www.leafbike.com/u_file/2302/04/photo/20-inch-front-fat-bike-conversion-kit-wire-diagram_3994ff0c09.jpg 

After place an order, wait for about 2 ~ 3 days can ship. 

Q: This is what’s on the trike, your hub suggestion shows 135mm will it work?
Technical details
Hub Motor type Brushless direct drive Output range 250 – 6000 Watt Voltage range 48 – 96 Volt Maximal Amp 90 Amp RPM / V 10 Torque 115 – 150 Nm Efficiency 88% Weight 9 kg Drop out 140 mm Disc brake mounting Yes Sprocket gear Freewheel mounting Front or rear wheel Rear wheel Controller type Sensorless & sensor controllers
Magnet width 40 mm Poles 46 pair Hall sensors 3 x Honeywell Bearings NSK industrial Sealings Yes Motor phase plug 3 x XT150 Hall sensor plug Mini XLR 5 pin Temperature sensor Yes
Spokes SAPIM 12G INOX (size = 2,6 mm) Rim EXAL EX25 20/26”  extra wide rim Rim sizes 20” & 26”

A: 135mm works.  (add 1 washer both side, reach 140mm)
Below is 48V 2000w motor drawing. (46 pcs 42mm width magnet, 3 pcs hall sensor, 12G spokes, 5mm or 6mm phase wire)
https://www.leafbike.com/u_file/2301/07/photo/2000w-front-beach-snow-fat-bike-motor-drawing_bbdbc1e4ce.jpg 

Below is 60V 2000w motor drawing (46 pcs 35mm width magnet, 3 pcs hall with 1 temp, 12G spokes, 3mm phase wire)
https://www.leafbike.com/u_file/2301/07/photo/1500w-front-beach-snow-fat-bike-motor-drawing_890f09dd23.jpg 

20 inch 60V 2000W front hub motor Beach Snow Fat Tire bike conversion kit

Posted by on August 31, 2023 Comments Off on 20 inch 60V 2000W front hub motor Beach Snow Fat Tire bike conversion kit

Q: Can this be purchased for the 20 inch 60V 2000W front wheel? I Have a 60V 20A battery set up trike.
Item No.LBCK20602000RS 20 inch 60V 2000W rear hub motor – Beach Snow Fat Tire bike conversion kit

A: Yes, we have.
Please click below link. Thanks.
https://www.leafbike.com/products/beach-snow-fat-bike-kit/20-inch-60v-2000w-front-hub-motor-beach-snow-fat-tire-bike-conversion-kit-1329.html

Q: I don’t see a way to put my disk brake rotor on the front hub motor. Is it possible to do this?

A:There are six screws on hub motor cover for disc.

Q: Thanks for your help but my e-trike disc hub is on the left side or the opposite of your picture. Do I have to install on my right side to work.

A: This hub motor default: disc on the left side.   (Disc cover on the left side of frame)
If you need to install disc on the right side. We also can make this motor ‘s cover on the right side of frame.

Q: Can you build something like this? I need it to be able to handle more torque than speed. I am about 340 lbs .

60V 20AH Lithium Battery Pack
 QK TC65 Motor 
Motor type Brushless direct drive Output range 250 – 6000 Watt Voltage range 48 – 96 Volt Maximal Amp 90 Amp RPM / V 10 Torque 115 – 150 Nm Efficiency 88% Weight 9 kg Drop out 140 mm Disc brake mounting Yes Sprocket gear Freewheel mounting Front or rear wheel Rear wheel Controller type Sensor lesscontrollers. Magnet width 40 mm Poles 46 pair Hall sensors 3 x Honeywell Bearings NSK industrial Yes Motor phase plug 3 x XT150 Hall sensor plug Mini XLR 5 pin Temperature sensor Yes
18 FET Controller or better
 20” x 4” Knobby Front Tire 

A: We can make disc on the right side.  (But there is a issue. Your 140mm disc ‘s 6 pcs screws are easy to loose.
Our 60v 18 -mosfet controller, max about 45amp. Motor phase wire is 3mm. (weight is less than 9kg)
If need to stronger motor, please click below site. Below motor phase wire is 5mm or 6mm (weight is over than 9kg)
This motor can work with 60v,72v controller. 
https://www.leafbike.com/products/beach-snow-fat-bike-kit/20-inch-48v-52v-2000w-front-hub-motor-beach-snow-fat-tire-bike-conversion-kit-1169.html

48V 52 V 2000W motor kit

Posted by on August 29, 2023 Comments Off on 48V 52 V 2000W motor kit

Q: The 2000w bike conversion kit arrived safe and sound. I wonder if you would explain to me some of the wire connectors are for. What I should set
-U02 Power Watt Max  1000W default or 2000W hub motor
-U03 What is power gear? Saved, Gear 1,2…
-P07 Speed magnet number?24 ,36,48?
-P14 Current Limit? 30A-40A?
After I install the brake Cut off sensor I have E2 error what wrong
What are 2 blue wire connector for? 2  5 Pin connector  at motor I use either one They work fine So what is the extra 5 pin connector for?
Please help me to make it work right.
The speed I got 86 kmh on 48V 15ah battery

A: U02 – You can set it as your hub motor power  (Don’t set)
U03 – Don’t set
P07 — 46
P14 — You can set 30A or 40A.  (Less current is bigger for controller) You can set 30A first, then ride or uphill, if good. That’s good. If not good for uphill, set it to 40A.
 
E2 – Your brake lever or sensor is braking. (Cut off motor power, at this time, motor can’t work)
 
Two blue wires are used for:  look for phase wire, look for correct working way.  If can’t work. Connect these blue wires together. Controller can look for right working way by itself.
 
5 pin extra — 2 sets of 5 pin extra are the same.  They are connected to 2 sets of hall sensors. If one hall is broken,motor can’t work. 
Just use the other 5 pin plug then can solve motor hall issue.

Q：Would you help me with the E7 error code after 2 blue wire connected
Is the hub motor failed? After connect 2 blue wire together I got E7 and motor stopped working. I worked fine I got 90kmh after I follow your instruction.
So what now?
The hub Motor and the speed controller work fine so far just a minor issue with the light wire (red+black)from the controller that does not work
when I connect it with my e bike rear light ,and there are 2 wires (red+white) from display What are they for?
Would you help me with bike conversion kit. If I succeed to upgrade my e bike I may do upgrade for my friends.
I will properly need you with more orders.
It worked now. THANKS

Looking for bike conversion kit

Posted by on August 27, 2023 Comments Off on Looking for bike conversion kit

Q: I am looking for support, when it comes to finding the right bike conversion kit: 

My requirements are: 

E-Motorcycle Maxi (50ccm motorbike, Photo attached):
Total weight (driver 80kg +bike 34kg + battery 48V/20Ah 7kg + hub motor 9kg +controller 1,5 kg): 131,50 kg –> weight of components are just an estimation!
Hub motor must be mounted on a 1,35 x 17″ rim with spokes.
Cont. Wattage of Hub Motor: as high as possible! around 3000 W ideal
max. vehicle speed @ lowest battery voltage (40V) @ 0 climb angle (13 x 3,1V = 40V): 60 km/h
max. climb angle: 8-10 %
max. swing arm dropout: 138 mm
thickest axle diameter: 12 mm (see reference picture)
Battery
Nominal voltage: 48V
Peak Voltage (fully charged): 54,6V
min. Capacity: 20 Ah
Range –> unknown as this will be tested with first kit
Controller must be programmable (V max limit changeable, phase current changeable if possible)
48V system fit to hub motor

A: Thanks for you are interested in our products.

Please below link. These 17 inch bike conversion kits are fit for you.
https://www.leafbike.com/products/electric-motorcycle-kit/17-inch-electric-motorcycle-wheel/

Q: Can you please send me data sheets to the strongest hub motor and a mechanical drawings.
 A:If need to stronger, replace this stronger controller. We can make this kind of 17 inch, just replace a rim.
https://www.leafbike.com/products/beach-snow-fat-bike-kit/26-inch-2000w-5000w-high-power-rear-hub-motor-bike-conversion-kit-992.html
 
But this 2000w hub motor is fit for 170mm or 190mm dropout.

Q:  I cant use this hub motor as the dropout is too big. 
Looking for a hub motor with max 138mm dropout. Whats the strongest you can offer? 

Please send me data sheet, test curves and mechanical drawing of the hub motor

A: If need to install sprocket / Chain, max use 1500w motor.If don’t need to install sprocket / Chain, max 2000w motor.

Q: Please send me datasheet, test curves and mechanical drawing of the 1500w hub motor.